Scott, John Paul, author
The University of Chicago Press, 1958
Buku Teks
Singer, Peter, author
2009
Buku Teks
by Malcolm S. Gordon [and others]
Macmillan, 1977
Buku Teks
Wilson, James A. (James Albert), 1929-, author
Macmillan, 1972
Buku Teks
edited by Ian R. Swingland and Paul J. Greenwood
Clarendon Press, 1983
Buku Teks